ocfs2: Mounting device (7,2) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.2.1009/11227 is trying to acquire lock: ffff888043ada9d8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_init_acl+0x1c3/0x800 fs/ocfs2/acl.c:367 but task is already holding lock: ffff8880693ad918 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3ac/0x700 fs/ocfs2/journal.c:369 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x97/0x200 kernel/locking/rwsem.c:1574 ocfs2_start_trans+0x3ac/0x700 fs/ocfs2/journal.c:369 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:801 [inline] ocfs2_reserve_suballoc_bits+0x7b7/0x4850 fs/ocfs2/suballoc.c:950 ocfs2_reserve_new_metadata_blocks+0x415/0x9a0 fs/ocfs2/suballoc.c:1100 ocfs2_expand_inline_dir fs/ocfs2/dir.c:2881 [inline] ocfs2_extend_dir+0xd35/0x4b60 fs/ocfs2/dir.c:3243 ocfs2_prepare_dir_for_insert+0x339a/0x5190 fs/ocfs2/dir.c:4361 ocfs2_mknod+0xa16/0x2240 fs/ocfs2/namei.c:298 ocfs2_mkdir+0x180/0x430 fs/ocfs2/namei.c:660 vfs_mkdir+0x408/0x620 fs/namei.c:5270 filename_mkdirat+0x289/0x520 fs/namei.c:5303 __do_sys_mkdirat fs/namei.c:5324 [inline] __se_sys_mkdirat+0x35/0x150 fs/namei.c:5321 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (sb_internal#5){.+.+}-{0:0}: percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline] percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] __sb_start_write include/linux/fs/super.h:19 [inline] sb_start_intwrite include/linux/fs/super.h:177 [inline] ocfs2_start_trans+0x2ac/0x700 fs/ocfs2/journal.c:367 ocfs2_orphan_for_truncate fs/ocfs2/file.c:397 [inline] ocfs2_truncate_file+0x634/0x14b0 fs/ocfs2/file.c:506 ocfs2_setattr+0x1641/0x1d10 fs/ocfs2/file.c:1224 notify_change+0xbb8/0xec0 fs/attr.c:556 do_truncate+0x1c2/0x250 fs/open.c:68 coredump_file fs/coredump.c:962 [inline] do_coredump fs/coredump.c:1099 [inline] vfs_coredump+0x37e2/0x4530 fs/coredump.c:1195 get_signal+0x1094/0x12c0 kernel/signal.c:3024 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline] exit_to_user_mode_loop kernel/entry/common.c:101 [inline] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline] irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline] irqentry_exit+0x2ba/0x8f0 kernel/entry/common.c:165 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 -> #1 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1631 ocfs2_try_remove_refcount_tree+0xb6/0x360 fs/ocfs2/refcounttree.c:959 ocfs2_truncate_file+0xe90/0x14b0 fs/ocfs2/file.c:527 ocfs2_setattr+0x1641/0x1d10 fs/ocfs2/file.c:1224 notify_change+0xbb8/0xec0 fs/attr.c:556 do_truncate+0x1c2/0x250 fs/open.c:68 coredump_file fs/coredump.c:962 [inline] do_coredump fs/coredump.c:1099 [inline] vfs_coredump+0x37e2/0x4530 fs/coredump.c:1195 get_signal+0x1094/0x12c0 kernel/signal.c:3024 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline] exit_to_user_mode_loop kernel/entry/common.c:101 [inline] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline] irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline] irqentry_exit+0x2ba/0x8f0 kernel/entry/common.c:165 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 -> #0 (&oi->ip_xattr_sem){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3181 [inline] check_prevs_add kernel/locking/lockdep.c:3300 [inline] validate_chain kernel/locking/lockdep.c:3924 [inline] __lock_acquire+0x15ff/0x2e40 kernel/locking/lockdep.c:5254 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5906 down_read+0x97/0x200 kernel/locking/rwsem.c:1574 ocfs2_init_acl+0x1c3/0x800 fs/ocfs2/acl.c:367 ocfs2_mknod+0x166a/0x2240 fs/ocfs2/namei.c:414 ocfs2_create+0x195/0x460 fs/ocfs2/namei.c:676 lookup_open fs/namei.c:4503 [inline] open_last_lookups fs/namei.c:4602 [inline] path_openat+0x1347/0x3850 fs/namei.c:4854 do_file_open+0x23e/0x4a0 fs/namei.c:4886 do_sys_openat2+0x115/0x200 fs/open.c:1368 do_sys_open fs/open.c:1374 [inline] __do_sys_openat fs/open.c:1390 [inline] __se_sys_openat fs/open.c:1385 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1385 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &oi->ip_xattr_sem --> sb_internal#5 --> &journal->j_trans_barrier Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&journal->j_trans_barrier); lock(sb_internal#5); lock(&journal->j_trans_barrier); rlock(&oi->ip_xattr_sem); *** DEADLOCK *** locks held by syz.2.1009/11227: 8, last CPU#1: #0: ffff88803b630510 (sb_writers #28){.+.+}-{0:0} , at: mnt_want_write+0x41/0x90 fs/namespace.c:494 #1: ffff888043adad00 (&type->i_mutex_dir_key#20 ){+.+.}-{4:4} , at: inode_lock include/linux/fs.h:1024 [inline] , at: open_last_lookups fs/namei.c:4599 [inline] , at: path_openat+0xae9/0x3850 fs/namei.c:4854 #2: ffff888043ad9c40 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE] ){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] ){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x170/0x4850 fs/ocfs2/suballoc.c:904 #3: ffff888043ad8b80 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE] ){+.+.}-{4:4} , at: inode_lock include/linux/fs.h:1024 [inline] , at: ocfs2_reserve_suballoc_bits+0x170/0x4850 fs/ocfs2/suballoc.c:904 #4: ffff888043808b80 ( &ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4} , at: inode_lock include/linux/fs.h:1024 [inline] , at: ocfs2_reserve_local_alloc_bits+0x11f/0x2680 fs/ocfs2/localalloc.c:636 #5: ffff88803b630800 (sb_internal#5 ){.+.+}-{0:0} , at: ocfs2_mknod+0x116a/0x2240 fs/ocfs2/namei.c:365 #6: ffff8880693ad918 (&journal->j_trans_barrier ){.+.+}-{4:4}, at: ocfs2_start_trans+0x3ac/0x700 fs/ocfs2/journal.c:369 #7: ffff88803bf6ebb0 (jbd2_handle #2){.+.+}-{0:0}, at: start_this_handle+0x1fc3/0x2210 fs/jbd2/transaction.c:444 stack backtrace: CPU: 1 UID: 0 PID: 11227 Comm: syz.2.1009 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e2/0x300 kernel/locking/lockdep.c:2059 check_noncircular+0x12f/0x150 kernel/locking/lockdep.c:2191 check_prev_add kernel/locking/lockdep.c:3181 [inline] check_prevs_add kernel/locking/lockdep.c:3300 [inline] validate_chain kernel/locking/lockdep.c:3924 [inline] __lock_acquire+0x15ff/0x2e40 kernel/locking/lockdep.c:5254 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5906 down_read+0x97/0x200 kernel/locking/rwsem.c:1574 ocfs2_init_acl+0x1c3/0x800 fs/ocfs2/acl.c:367 ocfs2_mknod+0x166a/0x2240 fs/ocfs2/namei.c:414